Explain How the Human Ear Works. - Science

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Explain how the human ear works.

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Different sounds produced in our surroundings are collected by pinna that sends these sounds to the ear drum via the ear canal. The ear drum starts vibrating back and forth rapidly when the sound waves fall on it. The vibrating eardrum sets the small bone hammer into vibration. The vibrations are passed from the hammer to the second bone anvil, and finally to the third bone stirrup. The vibrating stirrup strikes on the membrane of the oval window and passes its vibration to the liquid in the cochlea. This produces electrical impulses in nerve cells. The auditory nerve carries these electrical impulses to the brain. These electrical impulses are interpreted by the brain as sound and we get a sensation of hearing.

Concept: Human Ear
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Chapter 12: Sound - Exercises [Page 175]


NCERT Class 9 Science
Chapter 12 Sound
Exercises | Q 22 | Page 175

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